[arethuza]

For that kind of approach to work you'd have to be doing a lot of tasks/projects that are practically identical. I've never worked anywhere (from academic research, to startups to large companies) where any one "project" had enough commonality with others that this approach would generate any value - although I keep seeing generic PMs trying to apply it and failing over and over again.

Of course, it's a good idea to investigate why expected timescales differed from expectations - but IMHO detailed time recording isn't the way to do that.

Of course, YMMV.